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Bizarreness, Sponsored by Fedora Core

It seems that I'm having some odd problems with my Linux box, which essentially boil down to this: I have a 100Mb network. Between Windows boxes I can typically get approx 70Mbps throughput on an un-loaded link. Between my Linux box and any other box on the system I can get, at best, 3-5Kbps throughput, even on a direct (x-over) link.

I've tried playing with route, and I've noticed that setting my Windows box as the default gateway for all traffic does improve matters (though I can't really give you a benchmark measure of how much. All I can say is that the 9MB file that was taking ~45mins to copy from the win box to the lin box moved in about ten seconds). However, it only improves things between those two boxes since once this is done my Linux box can't resolve any other host names for some reason (time to batten down the hatches and switch to static IP addresses and update my hosts.conf, methinks).

Any ideas are much appreciated.

CD

Last edited by CodeDragon; May 5th, 2004 at 05:30 AM.

There are only two truly infinite things, the universe and stupidity. And I am unsure about the universe. - Albert Einstein

In practice, hubs are "slower" than switches, but they should not be this slow.

You mention that communications with the WinXP Box is OK if you set it as the default gateway. From the look of your setup I'm guessing the Win2003 server and laptops is probably a test lab, but if it is not, then Win2003 could act as the gateway/DHCP server.

But I'd look into the Fedora Core's NIC performance, to start with.

Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so. -Douglas Adams

Does it browse the internet fine? Also I'm assuming you are using samba to connect to the M$ machine. What version? How about if you use say winscp and copy files from the linux box to the windows box? Same speeds? faster? It sounds to me like a samba issue and not a nic issue IMHO. Post back.

"I feel like one of those mass murderers on death row. I never understood how the hell they got more chicks than I did. Now I know. They sold crap on eBay." -- Anonymous ebayer

Does it browse the internet fine? Also I'm assuming you are using samba to connect to the M$ machine. What version? How about if you use say winscp and copy files from the linux box to the windows box? Same speeds? faster? It sounds to me like a samba issue and not a nic issue IMHO. Post back.

It browses the net fine, but given that I'm used to speeds of 2-3Kbps as standard on my connection I wouldn't notice any slowdown.

I've tried transferring files using winscp, pscp, ftp, http and Samba and I get all the same results. In fact both pscp and winscp crashed when trying to transfer files, and any FTP client will keep reporting "Server not responding" for several seconds between files. Not sure of the Samba version, it's whatever came with Fedora (3.x I think) as I haven't really played with it all that much.

There are only two truly infinite things, the universe and stupidity. And I am unsure about the universe. - Albert Einstein

Have you patched/updated the system yet? I think fedora has something similar to the redhat network update client don't they? Anyways I would check to make sure that the nic drivers that are installed are the proper ones for said nic (ie their are several different versions of the tulip and realtek drivers). What kind of nic do you have and when you lsmod what module shows as attached to it?

"I feel like one of those mass murderers on death row. I never understood how the hell they got more chicks than I did. Now I know. They sold crap on eBay." -- Anonymous ebayer

Have you patched/updated the system yet? I think fedora has something similar to the redhat network update client don't they? Anyways I would check to make sure that the nic drivers that are installed are the proper ones for said nic (ie their are several different versions of the tulip and realtek drivers). What kind of nic do you have and when you lsmod what module shows as attached to it?

I haven't patched yet, but I've had an unpatched version of Fedora installed on another machine with the same card with no issues, so I don't think it's a driver problem.

The nic is a 3com 3c595. When I lnsmod I get the module 3c59x.

I'm going to try running a basic windows install image (I still have my old hard drive for that machine, so it's a straight swap job) on the system tonight to see if it's a card issue. I'll keep you posted.

There are only two truly infinite things, the universe and stupidity. And I am unsure about the universe. - Albert Einstein